Rail-sawing machine



(No Modell.)

E. C. SMITH.

RAIL SAWING MACHINE. No. 340,682. Patented Apr. 27, 1886.

"im H lllllllllllll= wif@- UNITED STATES PATENT OEEICE,

EDVARD O. SMITH, OF BROOKLYN, NEV YORK. y

RAIL-SAWING NIACHlNE.

SPECIFICATION forming part of Letters Patent No. 340,682, dated ip1'i127, 1886.

Application filed Srptember 10, 1885. Serial No. 176,723. (No model.)V

To @ZZ whom it may concern:

Be it known that I, EDWARD (LSMITH, a citizen of the United States, residing atBrooklyn, in the county of Kings and State of New York, have invented a new and useful Improve ment in Rail-Sawing Machines, of which the following is afull, clear, and exact description.

My invention relates to improvements in machines for sawing olf railway bars or rails; and the object of my improvement is to provide a machine of this character which is portable, simple, and inexpensive in construction and effective in operation with but little expenditure of power. This objectlaccomplish by the mechanism shown in the accompanying drawings, in which- Figure l is a front elevation of a rail-sawing machine embodying my improvements. Fig. 2 is a side elevation of the same. Fig. 3 is a transverse section taken on the line ac a: of Fig. 2, and Fig. Llis a perspective view of the sliding carriage removed from the main supporting-frame.

A represents the main frame, ou which is mounted the operating mechanism. This is an elongated rectangular frame having open sides, and provided at the lower end with jaws B C, one of which, B, is curved inward, and so shaped as to form a bed or rest for the rail B', which is firmly clamped thereto by means of a threaded bolt, c, working through a correspondingly-threaded opening in the opposite jaw, C.

D is an inner frame or carriage fitted within the main frame A, and arranged to slide up and down between ways or guides a a, (see Fig. 3,) formed on the side bars of the frame A,which guides fit into corresponding recesses or depressions, a', in the side pieces of the carriage D. To this sliding carriage is hung the carrying-frame for the saw.

On one end of a iixed shaft, f, projecting from the carriage D, is pivoted the frame E, so that it can have an oscillatory movement past the side of the frame A. The frame E is composed of two parallel bars closed at both ends, and provided at the swinging end with prolongations forming arms e e, between which is secured a serrated blade, N, the cutting-edge of which is the arc of a circle concentric with the pivotal point f of the frame EC The sawblade N is rigidly secured to one of the arms, and is held to the other and tightened by means ofthe screw-bolt 9L,which passes th rough an aperture iu the arm c and receives the nutn.

G- is a horizontal shaft supported in bearings g g in the side pieces of the sliding carriage D, with its ends projecting beyond the frame A, on one of which is mounted an eccentric, F, provided with a grooved rim adapted to embrace the side bars of the saw-carrying frame E. On the opposite end of the shaft G is mounted the gear-wheel H, which engages a smaller toothed wheel, I, that is pivoted to a shaft proj ecting from the upper part of the sliding carriage D, and which is turned by a crank, J.

A rotary movement is communicated to the eccentric F through gear-wheels I-I I, which causes au oscillation of the saw-carrying frame E over the rail B. As the saw-blade is carried back and forth,it is fed downward by the movement of the carriage D within the frame A, and the motion of the carriage is controlled by means of the vertical screw-shaft K, which passes up through openings d', formed in the cross-beams d d of the carriage E, and is swiveled thereto by the set-washers L M. The upper and threaded portion passes through a threaded opening in the top cross'beam of the frame A, preferably provided with a bushing, k, of soft metal, and terminates in a crank, k', by which it is rotated to lower the carriage D.

Instead of using a crank-motion for lowering the carriage D to feed the saw, I may cmpioy means whereby the feed is automatic, being controlled bythe same movement that operates the eccentric F. To effect this a cogwheel, l), is mounted on the lower end of the vertical screw-shaft K, immediately over the horizontal shaft G, which carries the eccentric F, and on this shaft are provided one or more projecting pins, Q, which, when the shaft G is rotated, will engage the cog-wheel and cause the rotation ofthe shaft K, lowering the carriage D. At the same time the rotation of the shaft G actuates the eccentric F and causes the oscillation of the frame E, carrying the saw-blade.

l.. In a railsawing machine, the combination of a vertical frame, a movable carriage mounted therein, a smv-frame pivoted to said carriage, a, horizontal shaft mounted in the carriage, provided with a grooved eccentric arranged Within the saw-frame, and geur- Wheels for actuating said shaft, as set forth.

2. In a raihsztwing machine, the combina tion of a. main frame provided with ways, :L carriage moving in said ways, a saw-carrying frame pivoted to :t shaft projecting fromthe carriage, and at horizontal shaft mounted on said carriage and provided :it one end with an eccentric confined between the side bars of the saw-freine, and :it the other With @gear-Wheel which engages a gear-Wheel mounted on a shaft projecting from the upper part of said carriage, as set forth,

3. The combination of the main frame, the sliding carriage, the driving-shaft carrying an l eccentric, its operating mechanism, and a ver EDVARD C. SMITH.

Vitnesses:

K. NEWELL, F. MARTIN. 

